Stair-carpet fastener.



innea ferior'way. A coil 27 extends around the i core in a plane transversethereto, so as to smug-between said core and the poles and magnetic conductors, 7, 8 of the. magnet, and

ispivotally supported from the bent-up portions-19,- ill-of the bridges, as will be hereinafter described. Said coil is formed of wire. Wound upon aframe 28 which constitutes one of. the features of any. invention.

The blank .fo'r this frame, as .best shown in Figs. 8, 4 and 3, is preferably ;.stamped out oi a single piece of'sheet material, and afterward bent into the desired-form and preferably soldered at the over-lapping end. When so-bentit provides two parallel sides 29, 30

-held in spaced relation to each other by means ct the ends 31, 31, so that a rectangular frame, is provided, around which the wire is. wound in the plane of the frame. In

order to preventthe'wire of the coil from slippin laterally oil theframe, retaining flanges 3, 34' are bent up at the. edges of the parallel-sides 29, I also provide supporting extensions projecting-from the opposite sides of the frame and each comprising wings 35, 36 or- 3?, 38 projecting from the longitudinal edges of both parallel sides 29, 30 or the flanges 33, 34: thereof, said wings being equidistant from the ends of thev frame. The outer ends of each pair ofwings are preferably bent inward at substantially" right angles to superpose one upon the other, as-at 39, 410 or 41, 42, said over-lapping ends being preferably apertured as at 13, or 4A forlthe introduction of a pivot pin or 46 secured thereon to the frame by any 'suitable means, such as inner andouter nuts 4.7, 4 8 or 49, 50, at opposite sides of the parts upon said pin and clampingthe same together.

In order to pivotallysupport the frame 28, a screw 51 is provided centrally in each of the bent up portions 19, 19 of the bridges, 14, 14: it being understood that said screws 51, 51 are in axial alinement with and adapted to pivot lly receive the ends of the pivot pins 45, lt, oi the coil. Friction inay be reduced between the screws 51 and the pivot pins by use of jewels (not shown) in the ends oi the screws, as is old and well-known in the art, and which construction I preferably employ. Surrounding each of the screws 5-1 is a lock nut 52, outside the bridge 1 which lock'nut has a reduced portion 53 for spacing the head 54 away from the bent. upportion 19 of the bridge and upon each of the said reduced portions 53, and ingglafterl through the coil.

therefrom as well as from the bridge 14, is a tension leyer 55 adapted to be swung in a plane perpendicular to the axis of the coil and having one end bent inward toward the magnet substantially parallel to said axis, as at 56, and having its other end provided with a longitudinal slot 57. In order to frictionally retain said levers in desired angular position, I place on the reduced portion 53 of each loclr nut 52, between its head 54 and the tension lever 55, a spring washer 58, said Washer and tension lever being insulated one from the other as shown. 'The tension levers 55, 5,5, are connected with the terminals of the instrument in any suitable and welllrnown manner, not shown.-

it may here be noted that the disk-shaped core 25 is supported in axial alinement with the pivot pins 45', 16 of the coil frame and screws 51 pivotally supporting the same, and also at the centers of the openings 18, 18 of the bridges 14, i l. The frarne'28 supporting the wire coil 27 is constructed so thatthe air gap between it,the pole faces, and the magnetic conductors, is the least possible permitting the coil to swing without obstruction. Similarly the disk-shaped core 25 is shaped so as to minimize the airspace between itself and the coil 27, without obstructing the free swing of the latter.

Spiral springs 59, 6.0 coiled flat like clock springs, are supported upon opposite sides of the frame 28 by having their inner ends secured fixedly to insulated terminals 32 upon the pivot pins 45, 46, said terminals being clamped in fixed relation to the core frame by the nuts 48 and 5O. The inner ends of saidsprings have the extremities of the COll wire connected thereto, and the outer ends or" said springs 59, are secured, as by soldering, each to the bent down portion 56 of the adjacent tension lever These springs 59, 60 thus lie in planes substantially perpendicular to the aXial line upon which the coil 27 swings and their tension is adjusted so as to normally hold said coil in its zero position when. no current is passing Not only do the coil springs 59, 60 thus hold the coil, but at the same time they constitute connections for leading a current from the terminals of the instrument through the coil. Thus by conneoting the terminals of the instrument with a source of electro-motive force, the current will'flow through the windings of the coil,

and said coil will be deflected according to the amount of current, affording a measure or it.

of the boil I place a pointer or indicator 61, projecting towardthe closed end of the magnet 1 and adapted to indicate upon a scale 62 the. movements of the coil. This pointer is arranged upon the pin 45 between the folded Wingends 39, d0 of the frame and the ter- Upon the pivotal pin 45 at the upper side 7 HENRY J. BRUEHLER, 0F CLEVELAND, OHIO.

STAIR-CARBET FASTENER.

Application filed February 12, 1915.

To all whom it may concern:

Be it known that I, HENRY J. BRUEI-ILER, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in Stair-Carpet Fasteners, of which the following is a full, clear, and eXact description. 7

The object of this invention is to provide an in Xpensive and easily applied device for fastening a stair carpet to the stairs.

The invention consists in the construction and combination of parts shown in the drawings and hereinafter described and definitely pointed out in the appended claims.

In the drawings, Figure 1 is a front elevation of one of said devices; Fig. 2 is a sectional side elevation of one of the devices applied to a stair; Fig. 3 is a perspective view of a stair showing said devices in use securing a stair carpet thereto, and Fig. 4: is a sectional view in the plane of line 44 on Fig. 1.

Each of these devices is formed of two members, viz., a frame member A, and a carpet holding member B. The frame memher A is adapted, when in use, to occupy a substantially upright position close to a stair riser 21 and near an edge of the carpet; and it is held in this position by engaging the top surface of one stair tread, and the under side of the overhanging part of the next higher stair tread.

The frame member as shown is made of spring steel wire, which is so bent as to form a horizontal top bar 10, a horizontal bottom bar 12, and two sinuously bent and therefore resilient side bars 14. The top bar is preferably bent upward as shown to form two upwardly projecting spurs 11. The wire is likewise bent at the points where the bottom member and the side members join, to form the two forwardly projecting eyes 18.

The carpet holding member B is likewise formed of spring wire bent so that its central portion is in the form of a straight rod 15 which is threaded through and is movable endwise in the two eyes 18. At the outer end of this bar 15 the wire is bent inward forming the carpet holding arm 16 which is substantially parallel with the bar 15. The free end of this carpet holding arm 16 may be bent into any desired shape to give it a satisfactory appearance; and preferably at its end the wire is bent back- Speoification of Letters Patent.

jacent edge of the carpet.

Patented June 1, 1915.

Serial No. 7,912.

ward to form the prong 16 The opposite end of this wire is likewise bent back upon itself forming the arm 17 which passes behind the adjacent side member 14, and then forward under and partly around the bar 15. This arm 17 acts as a spring tending to turn the bar 15 in the eyes to a position such as will press the arm 16 against the front face of the carpet.

To apply the described device to use, one first, by endwise pressure upon the body frame member, shortens it enough to cause it to take the position shown between the top of one stair tread and the overhanging part of the next higher stair tread. This frame member is inherently expansible lengthwise when it has been put into this position, and therefore the prongs 11 and 11 are caused to dig into the surfaces of the stair treads with which they engage, which results in holding the frame member firmly in position. Two of these frame members are used in association with each stair riser, and they are located adjacent to each of the edges of the carpet, and in position such that the carpet will cover them both. When they have been so placed the members B are moved outward so as to carry the inner end of the arm 16 beyond the plane of the ad- When the carpet is pulled down to the position shown, the members B are then moved in the contrary direction to carry the arm 16 over the surface of the carpet.

When the carpet has been properly stretched, the spring arm 17 will turn rod 15 and cause arm 16 to press against the face of the carpet; in fact, manual pressure may be applied to this arm sufficient to drive the spur 16 through the carpet. When this has been done the carpet at the points specified will be held in the desired position with great enough security for practical purposes.

Having described my invention, I claim:

1. The combination of a frame member adapted to occupy a position close to a stair riser and to engage the top surface of one adjacent stair tread and the bottom surface of the overhanging front edge of the next higher stair tread,which frame has at its lower end two alined forwardly projecting eyes, a carpet holder comprising a straight bar which is threaded through and is slidable endwise in said eyes and is provided at its outer end with an inwardly bent arm oppositely ment with each other, and bridges on the magnet for receiving said pivot pins.

14:- In an electrical measuring instrument, the combination with a magnet, of a moving coil frame having at itsopposite upper and lower sides projecting transverse bridge-like portions, a pointer or indicator having a middle portion lying flatwise upon the up per bridge-like portion of the frame and bent down over the lateral edges of the same, means on said bridge-like portions of the frame for pivotally mounting the same, and means on the magnet for receiving said mounting means.

15. In an electrical measuring instrument, the combination with a magnet, of a moving coil frame having a coil wound thereon, said frame having at its upper and lower sides supports which project over the winding at a a distance therefrom, means on said supports for pivotally mounting the frame, and bridges for receiving said pivotal mounting means and connecting the moving coil to the magnet.

16. In an electrical measuring instrument of'the character described, the combination with a magnet having facing poles providing slots withcbottoms curved in the plane of the magnet, and a moving coilarranged between said poles in said slots.

17. In an electrical measuring instrument, the combination with a magnet, of opposite bridges extending from one pole tothe other at the top and bottom of the magnet, means securing said bridges in fixed relation to each other, a moving coil mountedin said bridges between the same, a pointer carried by said moving coil, a scale plate mounted on one of said bridges, and means for securing said bridges to the magnet, whereby the moving coil, pointer and scale plate canbv detaching the bridges from the magnet be removed without disturbing their relation to one another.

18. In an electrical measuring instrument, the combination with a magnet, of opposite away from the frame in alinemenace bridges extending from one pole to the other at the top and bottom of the magnet, means securing said bridges in fixed relation to each other, a moving coil mounted in said bridges between the same, a pointer carr ed by said moving coil, and means for securing said bridges to the magnet, whereby the moving coil and pointer can by detaching the bridges from the magnet be removed without disturbing theirrelation to said bridges.

19. In an electrical measuring instrument, the combination with a magnet, of oppbsite bridges extending from one pole to the other at the top and bottom of the magnet, a core between said bridges, means securing said bridges in fixed relation to said core, a moving coil mounted entirely between said bridges and incl'osing said core, and means for securing said bridges to the magnet.

20. In an electrical measuring instrument, the combination with a magnet, of opposite bridges extending from one pole to the other at the top'and bottom of the magnet, a moving coil between said bridges having a projecting pivot pin, a screw in one of said bridges for said pivot pin, a headed lock-nut on said screw for locking the same, a tension lever pivoted on the shank of said lock-nut, a spring secured at one end to said tension lever and at the other endto said pivot pin, and a spring washer on the shank of said lock-nut adapted to press resiliently against the tension lever when said lock-nut is seated rigidly against the bridge.

21. In an electrical measuring instrument, the combination with a magnet having adjacent poles, a. core between said poles, bridges mounted upon opposite sides of said core in spaced relation thereto, a moving coil mounted entirely between said bridges and inclosing said core, and means for securing said bridges to the magnet.

IVAR w. nnoeenn.

Witnesses:

Howann 1'. KING,

MILDRED E. Bnoons. 

